Actual-Orochimaru or zombie-Orochimaru? Also I wanted Sasuke to have to die in a battle with Naruto otherwise what was the whole point of the stupid faceplamworthy "YOU SENSE IT DON'T YOU IF WE FIGHT THEN WE'LL BOTH DIE! IT'S SET IN STONE, OK" thing
Actual, he came back when his slave guy ate part of him. So then he took over part of his body and split off or whatever. The second part of your post is now no longer going to happen from the looks of it.
Hey look, it's actual ninjas! That don't suck!